Television apparatus



1943- E. P. LONGERICH TELEVISION APPARATUS Filed July 16, 1942 3 Sheets-Sheet 1 Inventor fine-if Loerzick 1943- E. P. LONGERICH 2,335,27

TELEVISION APPARATUS Filed July 16, 1942 5 Sheets-Sheet 2 Inventor ErZSZ' Plargzyrzbk NOV. 30, 1943. LONGERICH 2,335,287

TELEVISION APPARATUS Filed July 16, 1942 3 Sheets-Sheet 3 Patented Nov. 30, 1943 UNITED STATES PATENT OFFICE 'rnmvrsron APPARATUS Ernest r. Longerich, Mahwah, N. J. Application July 16, 1942, Serial No. 451,182

19 Claims.

The invention relates to television apparatus, and more particularly to improved natural color scanning means, the primary object of the inven-- tion being to provide means for more eflicient and more accurately synchronized color scanning, including more economical and more adjustable means for driving the color disk or the like.

Other important objects and advantages of the invention will appear in the following description and the appended drawings wherein for purposes of illustration preferred embodiments of the invention are shown.

In the drawings:

Figure 1 is a side elevational view of the unitary apparatus according to the present invention wherein the television screen, the color scanning disk, the lens system, and the viewing screen are enclosed in a single evacuated envelope, with the television tube shown applied to the television screen.

Figure 2 is a right hand end elevational view of Figure 1 with the television tube removed.

Figure 3 is a left hand end elevational view of I Figure 1.

Figure 4 is a vertical longitudinal sectional view taken through Figure 3 along the line 44, on a somewhat enlarged scale, and showing diagrammatically the circuits for operating the rotor, the scanner disk being shown in elevation.

Figure 5 is an enlarged side elevational view of the color scanner disk.

Figure 6 is a fragmentary enlarged transverse sectional view taken through Figure 5 along the line 8-6.

Figure 7 is a fragmentary transverse sectional view taken through Figure 5 along the line 1-1.

Figure 8 is an enlarged central sectional view taken through one of the electron emitters, and,

Figure 9 is a side elevational view similar to Figure 1, but on a reduced scale, of a modified form of the invention in which the lens system and the viewing screen are outside of the evacuated envelope containing the television screen and the color scanning disk.

Referring in detail to the drawings and first to Figures 1 through 8 thereof, the numeral 5 generally designates the evacuated envelope which comprises a fiat cylindrical dielectric, preferably opaque material housing 6 which has concentric axially aligned electrodes 1 and 8, respectively, traversing its opposite walls, the electrodes having pointed friction reducing metal shafts 9 whose points turn in sockets l0 and I0 formed in the opposite sides of the color scanner disk hub II. The electrodes are vacuum sealed in with the ferrule engaging the socket 24.

place and insulated from the walls of the housh s 6.

The inner peripheral wall 12 of the housing 6 is engaged by an anode ring 13 which is continuous and has a post portion l3 projecting through an upper part of the peripheral wall l2. The periphery of the scanner disk M, such as an R. C. A. color scanner disk is radially and concentrically spaced within and from the anode ring l3.

The upper right hand part of the housing 6 has a lateral relatively short cylindrical extensionl5, slightly larger in external and internal diameter than thetelevision tube I 6 to be used, the axis of the extension 15 being aligned with that of the television tube. A clear glass I1 is supported in the right hand end of the extension I 5, and light sealed and protective contact therewith by the television tube is provided through a rubber or other suitable gasketl8.

The upper left hand part of the housing 6 has another lateral somewhat longer cylindrical extension I 9 which is axially aligned with the cylindrical extension 15. The convex lenses 20 and 2| are suitably mounted in the extension 19 to project the color scanned image on the enlarged diameter ground glass or similar viewing screen 22, which is sealed in the outer and larger diameter end of a flaring opaque extension 23 of the outer end of the extension IS.

The color scanning disk l4 has any suitable or conventional color filter areas and is provided on its periphery at equally circumferentially spaced intervals with radial sockets 24, in which electron emitters 25 are mounted to project in a direction opposite to the direction of rotation of the scanner disk.

The sockets each comprise a mounting arm 26 extending along one side of the disk and fastened as at 21. A center contact 28 in the socket is electrically connected at 29 to a conductor 30 embedded in the disk near its peripheral edge. The piece 26 is electrically connected to the socket I I] by one of the wires 3|. One end of the conductor 30 is connected to the last socket in the series, with the opposite end connected by the wire 32 to the socket NJ. The sockets Ill and Ill are embedded in the disk as shown in Figure 7 of the drawings.

The emitters 25 each comprise a high heat resistant quartz glass body having a screw ferrule equipped base portion 33 having a center contact 34 to engage the center contact 28 of the socket An acutely angulated hollow conical head 35 is formed on the base portion and has in its small end a minute pin-point passage or orifice 36 through which the electrons generated and confined in the interior of the head are jetted in a path substantially tangential to the periphery of the scanner disk, to cause the disk to rotate in the opposite direction at high speed. The head 35 encloses a spiral conical resistor 31 which has one side connected to the center contact and the other side connected to the ferrule 33. The resistor wire may be of tungsten and coated with thorium oxide.

Referring to Figure 4 of the drawings the numeral 39 designates a wire connecting .the electrode 1 with the positive side of a low voltage source. The electrode 8 is connected by the wire 40 with the negative side of the same source. A branch wire 41 connects the wire 40 with the negative side of a high voltage source such as the secondary of a high voltage transformer (not shown). The positive side of the high voltage source is connected by the wire with the post l3 of the anode ring i3. A rheostat 43 is connected in the wire 42 to enable varying the energization of the anode ring and the electron emitters to control the speed of rotation of the color scanner disk II. The amount of high voltage employed affects the speed of the disk I4 which may run at speeds of about 20,000 revolutions per minute.

It is to be noted that the center of the scanner disk [4 must be exactly aligned with the lower edge of the viewing screen 22.

In the modified form shown in Figure 9 of the drawings, the above described structure ispresent with the exception of the flaring extension 23, the lens system and the viewing screen being external to the evacuated envelope and located in any desired arrangement as in a television receiver. This form can also be used as a transmitter in front of a television camera (not shown) in which arrangement the screen 22 would be the camera plate and the lenses 20 and 2| the camera lens system. The reference characters on Figure 9 designating corresponding parts with those shown in Figure 4 are identified by the same reference characters as those shown in Figure 4 with the letter a added as, for instance, 5.

If desired, the housing 6 may be provided with a threaded opening and a plug to close said opening for the purpose of giving access to the interior of the housing and particularly to the electron emitters 25. r

It is to be observed that the starting and the uniform speed of the scanner disk I4 is controlled by a synchronized generator, not shown, energizing the high voltage current source.

Having described the invention, what is claimed as new is:

1. Television apparatus comprising an evacuated envelope, a television screen in a wall of the envelope for registration with a television tube,

a rotary scanner disk mounted within said envelope with its axis parallelly spaced from the axis of said television screen, a viewing screen axially spaced on the opposite side of said color scanner disk from said television screen, an enlarging lens system effectively positioned between a minor portion of said scanner disk and said viewing screen, and operating means for rotating said color scanner disk.

2. Television apparatuscomprising an evacuated envelope, a television screen for registration with a television tube, a' rotary scanner disk mounted within said envelope with its axis parallelly spaced from the axis of said television screen, a viewing screen axially spaced on the opposite side of said color scanner disk from said television screen, and operating means for rotating said color scanner disk, the axis of said color scanner disk coinciding with the periphery of said viewing screen.

3. Television apparatus comprising an evacuated envelope, a television screen in a wall of the envelope for registration with a television tube, a rotary scanner disk mounted within said envelope with its axis parallelly spaced from the axis of said television screen, a viewing screen axially spaced on the opposite side of said color scanner disk from said television screen, and

operating means for rotating said color scanner disk, portions of said evacuated envelope enclosing said viewing screen and said lens system.

4. Television apparatus comprising an evacuated envelope, a television screen in a wall of the envelope for registration with a television tube, a rotary scanner disk mounted within said envelope with its axis parallelly spaced from the axis of said television screen, a viewing screen axially spaced on the opposite side of said color scanner disk from said television screen, and operating means for rotating said color scanner disk, said viewing screen and said lens system being located outside of the evacuated envelope.

5. Television apparatus comprising an evacuated envelope, a television screen in a wall of the envelope for registration with a television tube, a rotary scanner disk mounted within said envelope with its axis parallelly spaced from the axis of said television screen, a viewing screen axially spaced on the opposite side of said color scanner disk from said television screen, and operating means for rotating said color scanner disk, said operating means comprising an anode ring spacedly and concentrically surrounding said color scanner disk, electron emitters mounted at the periphery of said disk, said emitters being arranged to direct emitted electrons toward said anode ring at an angle substantially tangent to the disk and in a direction opposite to the direction of rotation of the disk, and electrical energizing means eifectively connected to said emitters and to said anode ring.

6. Television apparatus according to claim 5 wherein said energizing means comprises a high tension current supply with an adjustable current varying means incorporated therein to control the speed of rotation of the color scanner disk.

'7. Television apparatus comprising an evacuated envelope, a television screen for registration with a television tube, a rotary scanner disk mounted within said envelope with its axis parallelly spaced from the axis of said television screen, a viewing screen axially spaced on the opposite side of said color scanner disk from said television screen, a lens system effectively position between said viewing screen and said television screen, and means for rotating said scanner disk.

8. Television apparatus comprising an evacuanode ring spaced from -lelly spaced from the on the periphery of the disk, andmeans for energizing said electron emitting means to cause rotation oi! said disk.

9. Television apparatus comprising an evacuallelly spaced from the axis of said television screen, a viewing screen axially spaced on the opposite side of said color scanner disk from said television screen, and operating means for rotating said color scanner disk.

10. I 'elevision apparatus comprising an evacuated envelope, 9'. television screen in a wall 01' the envelope for registration with a television tube, a rotary scanner disk mounted within said envelope with its axis parallelly spaced from the axis of said television screen, a viewing screen axially spaced on the opposite side of said color scanner disk from said television screen, and operating means for rotating said color scanner disk.

11. Scanning means for use in television apparatus, comprising a rotatably mounted scanning wheel, primary electron emitting means mounted on the periphery of said wheel and adapted to emit electrons substantially tangentially to said wheel, an anode ring spaced from and surrounding the periphery of said wheel, and means for energizing said electron emitting means to cause rotation of said wheel.

12.Scanning means for use in television apparatus, comprising a rotatably mounted scanning wheel, a multiplicity of substantially equallyspaced primary electron emitting means mountedjon the. periphery of said wheel, an anode ring spaced from and surrounding the periphery of said wheel, and means for energizing said electron emitting means to cause rotation 01' said wheel.

l3. Scanning means for use in television apvision screen, a lens system eilfectively positioned paratus, comprising a rotatably mounted scanning wheel, primary electron emitting means mounted on the periphery of said wheel, an and surrounding the periphery or said wheel, and means for ensaid electron emitting means to cause rotation of said wheel and to .predeterminedly control the speed oi rotation thereof.

14. Television apparatus comprising an evacuated envelope, a television screen for registration with a television tube, a rotary scanner disk mounted within said envelope with its axis paralaxis oi said television screen, aviewingscreenaxiallyspacedontheoppodte side of said color scanner disk irom said teledisk.

between said viewing screen and said television screen, and means for rotating said scanner disk.

15. Television apparatus comprising an evacuated envelope, a television screen for registration with a television tube, a rotary scanner disk mounted within said envelope with its axis parallelly spaced from the axis of said television screen, a viewing screen axially spaced on the opposite side of said color scanner disk from said television screen, means for rotating said scanner disk. said disk rotating means comprising an anode ring spaced from and surrounding the scanner disk, electron emitting means mounted on the periphery of the disk, and means for energizing said electron emitting means to cause rotation of said disk.

16. Television apparatus comprising an evacuated envelope, a television screen for registration with a television tube, a rotary scanner disk mounted within said envelope with its axis parallelly spaced from the axis of said television screen, a viewing screen axially spaced on the axis of saidtelevision screen, a viewing screen axially spaced on the opposite side of said color scanner disk iron; said television screen, and 1 operating means for rotating said color scanner l8. Scanning means for use in television apparatus, comprising a rotatably mounted scanning wheel, primary electron emitting means mounted on the periphery of said wheel, an anode ring spaced from and surrounding the periphery or said wheel, and means for energizing said electron emitting means to cause rotation of said wheel.

l9. Scanning means for use in television apparatus, comprising a rotatably mounted scanning wheel, primary electron emitting means mounted on the periphery 01' said wheel, an

anode ring spaced from and surrounding the periphery oisaid wheel, and means for energizing said electron emitting means to cause rotation of said wheel, said wheel being mounted for rotation on a plurality oi electrodes in circui-t with said electron emitting means. I

manner P. mnemrcn 

